@article{GDZPPN002290448, title = {Homotopie-Operationen relativer Homotopiegruppen. II.}, journal = {Mathematische Annalen}, volume = {146}, year = {1962}, pages = {51-68}, language = {de}, url = {http://dml.mathdoc.fr/item/GDZPPN002290448} }
IBISCH, H.D. Homotopie-Operationen relativer Homotopiegruppen. II.. Mathematische Annalen, Tome 146 (1962) pp. 51-68. http://gdmltest.u-ga.fr/item/GDZPPN002290448/